.page-about {
  --about-bg: #0B0F1A;
  --about-blue-deep: #10203F;
  --about-card-bg: #F2EBD9;
  --about-card-ink: #1A1A1A;
  --about-muted: #8B93A7;
  --about-line: rgba(217, 199, 159, 0.25);
  --about-green: #39FF14;
  background-color: var(--about-bg);
  color: #F5F1E6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 1.5rem 0 3.5rem;
  background: linear-gradient(150deg, rgba(27, 59, 111, 0.92) 0%, rgba(11, 15, 26, 0.96) 55%, rgba(21, 15, 43, 0.98) 100%);
  border-bottom: 1px solid var(--about-line);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(217, 199, 159, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 199, 159, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -110px;
  width: 320px;
  height: 320px;
  background: rgba(106, 13, 173, 0.32);
  clip-path: polygon(0 0, 100% 28%, 100% 100%, 28% 100%);
  pointer-events: none;
}
.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  color: rgba(245, 241, 230, 0.55);
}
.page-about .about-hero .breadcrumb a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-about .about-hero .breadcrumb a:hover {
  color: var(--about-green);
}
.page-about .about-hero .breadcrumb-current {
  color: #F5F1E6;
}
.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 3rem 0 1rem;
  position: relative;
  z-index: 1;
}
.page-about .about-hero-main {
  position: relative;
  z-index: 1;
}
.page-about .about-hero-kicker {
  font-family: var(--font-meta);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-green);
  margin-bottom: 1rem;
}
.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0 0 1.25rem;
  color: #FFFFFF;
}
.page-about .about-hero .lead {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  line-height: 1.7;
  max-width: 40rem;
  margin: 0;
  color: rgba(245, 241, 230, 0.82);
}
.page-about .about-hero-side {
  display: none;
}

/* ---------- 品牌简史 ---------- */
.page-about .about-history {
  padding: 4rem 0 3rem;
}
.page-about .about-history .lead {
  color: rgba(245, 241, 230, 0.72);
  max-width: 42rem;
  margin-bottom: 2rem;
}
.page-about .about-heading {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  border-bottom: 1px solid var(--about-line);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}
.page-about .about-index {
  font-family: var(--font-meta);
  font-size: 0.85rem;
  color: var(--about-green);
  letter-spacing: 0.12em;
  line-height: 1;
}
.page-about .about-heading h2 {
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0;
  color: inherit;
}

/* ---------- 时间线 ---------- */
.page-about .history-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 1rem;
}
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .timeline-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 0;
  margin-bottom: 1.75rem;
}
.page-about .timeline-marker {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 0.4rem;
}
.page-about .timeline-year {
  font-family: var(--font-meta);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--about-muted);
  white-space: nowrap;
}
.page-about .timeline-node {
  width: 12px;
  height: 12px;
  margin-top: 0.9rem;
  background: var(--about-green);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.18), 0 0 14px rgba(57, 255, 20, 0.5);
  z-index: 1;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-about .timeline-marker::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 2.3rem;
  bottom: -2.4rem;
  width: 2px;
  background: linear-gradient(to bottom, rgba(57, 255, 20, 0.5), rgba(217, 199, 159, 0.2));
  transform: translateX(-50%);
}
.page-about .timeline-item:last-child .timeline-marker::before {
  display: none;
}
.page-about .timeline-card {
  position: relative;
  background: var(--about-card-bg);
  color: var(--about-card-ink);
  padding: 1.25rem 1.5rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-about .timeline-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, transparent 50%, var(--about-bg) 50%);
}
.page-about .timeline-card h3 {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}
.page-about .timeline-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.65;
  color: rgba(26, 26, 26, 0.82);
}
.page-about .timeline-item:hover .timeline-card {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}
.page-about .timeline-item:hover .timeline-node {
  transform: scale(1.25);
  box-shadow: 0 0 0 6px rgba(57, 255, 20, 0.25), 0 0 22px rgba(57, 255, 20, 0.7);
}
.page-about .history-figure {
  margin: 0;
  padding: 0.75rem 0.75rem 1rem;
  border: 1px solid var(--about-line);
  background: rgba(255, 255, 255, 0.04);
}
.page-about .history-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}
.page-about .history-figure figcaption {
  font-family: var(--font-meta);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--about-muted);
  padding: 0.85rem 0.25rem 0.1rem;
}

/* ---------- 核心指标 ---------- */
.page-about .about-stats {
  padding: 3.5rem 0;
  background: #070A12;
  border-block: 1px solid var(--about-line);
}
.page-about .stats-kicker {
  font-family: var(--font-meta);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--about-muted);
  margin-bottom: 2rem;
}
.page-about .stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem 1.5rem;
}
.page-about .stat-cell {
  border-left: 2px solid var(--color-pink);
  padding-left: 1rem;
  min-height: 96px;
}
.page-about .stat-num {
  display: block;
  font-family: var(--font-title);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-pink);
  font-variant-numeric: tabular-nums;
}
.page-about .stat-label {
  display: block;
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: 0.5rem;
  color: #F5F1E6;
}
.page-about .stat-desc {
  display: block;
  font-size: 0.8rem;
  color: var(--about-muted);
  margin-top: 0.2rem;
}

/* ---------- 2025改版亮点 ---------- */
.page-about .about-update {
  padding: 4rem 0;
  background: linear-gradient(145deg, rgba(27, 59, 111, 0.4), rgba(11, 15, 26, 0.1) 60%);
  border-bottom: 1px solid var(--about-line);
}
.page-about .update-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 2rem;
}
.page-about .update-text .lead {
  color: rgba(245, 241, 230, 0.85);
}
.page-about .feature-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.page-about .feature-list li {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.75rem;
  align-items: start;
  padding: 1rem 1.25rem;
  background: rgba(245, 241, 230, 0.06);
  border-left: 3px solid var(--color-purple);
  transition: background 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-about .feature-list li:hover {
  background: rgba(245, 241, 230, 0.09);
}
.page-about .feature-mark {
  font-family: var(--font-meta);
  font-size: 0.75rem;
  color: var(--about-green);
  letter-spacing: 0.08em;
  padding-top: 0.25rem;
}
.page-about .feature-list li span:last-child {
  font-size: 0.95rem;
  line-height: 1.6;
}
.page-about .update-figure {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.page-about .update-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-line);
  background: rgba(245, 241, 230, 0.04);
}
.page-about .update-figure figcaption {
  font-family: var(--font-meta);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--about-muted);
  padding-top: 0.75rem;
}

/* ---------- 服务与内容体系 ---------- */
.page-about .about-service {
  padding: 4rem 0 3rem;
}
.page-about .section-lead {
  max-width: 42rem;
  color: rgba(245, 241, 230, 0.72);
  margin-bottom: 2rem;
}
.page-about .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.page-about .service-card {
  position: relative;
  background: var(--about-card-bg);
  color: var(--about-card-ink);
  padding: 1.75rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-about .service-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, transparent 50%, var(--about-bg) 50%);
}
.page-about .service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
}
.page-about .service-num {
  font-family: var(--font-meta);
  font-size: 0.8rem;
  color: var(--color-blue);
  letter-spacing: 0.12em;
  border: 1px solid var(--color-blue);
  padding: 0.2rem 0.5rem;
  margin-bottom: 1rem;
}
.page-about .service-card h3 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}
.page-about .service-card p {
  margin: 0 0 1.25rem;
  font-size: 0.92rem;
  line-height: 1.65;
  color: rgba(26, 26, 26, 0.78);
  flex-grow: 1;
}
.page-about .service-card .btn-ghost {
  border-color: rgba(26, 26, 26, 0.35);
  color: var(--about-card-ink);
}
.page-about .service-card .btn-ghost:hover {
  background: var(--color-blue);
  border-color: var(--color-blue);
  color: #FFFFFF;
}
.page-about .service-figure {
  margin: 2.5rem 0 0;
  padding: 0;
  border: 1px solid var(--about-line);
  background: rgba(255, 255, 255, 0.03);
}
.page-about .service-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .service-figure figcaption {
  font-family: var(--font-meta);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--about-muted);
  padding: 0.85rem 1rem;
}

/* ---------- 备案与合规 ---------- */
.page-about .about-compliance {
  padding: 4rem 0;
  background: var(--about-card-bg);
  color: var(--about-card-ink);
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}
.page-about .about-compliance .about-heading {
  border-bottom-color: rgba(26, 26, 26, 0.18);
}
.page-about .about-compliance .about-index {
  color: var(--color-blue);
}
.page-about .compliance-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  border: 1px solid rgba(26, 26, 26, 0.14);
  padding: 2rem 1.75rem;
  background: var(--color-panel-light);
}
.page-about .compliance-label {
  font-family: var(--font-meta);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}
.page-about .compliance-icp {
  font-family: var(--font-title);
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 900;
  color: var(--color-blue);
  margin: 0 0 1rem;
  letter-spacing: 0.02em;
}
.page-about .compliance-main p:last-child {
  margin: 0;
  color: rgba(26, 26, 26, 0.78);
  line-height: 1.75;
  max-width: 38rem;
}
.page-about .compliance-side {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 0.25rem;
  border-top: 1px solid rgba(26, 26, 26, 0.12);
}
.page-about .compliance-contact {
  display: grid;
  gap: 0.4rem;
  font-size: 0.92rem;
  line-height: 1.6;
}
.page-about .compliance-contact p {
  margin: 0;
  color: rgba(26, 26, 26, 0.78);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .history-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 4rem;
    align-items: start;
  }
  .page-about .timeline-item {
    grid-template-columns: 96px 1fr;
  }
  .page-about .update-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 3.5rem;
    align-items: start;
  }
  .page-about .service-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }
  .page-about .compliance-panel {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: 3rem;
    align-items: start;
  }
  .page-about .compliance-side {
    border-top: none;
    border-left: 1px solid rgba(26, 26, 26, 0.12);
    padding-left: 2rem;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 1.5rem 0 4.5rem;
  }
  .page-about .about-hero-grid {
    grid-template-columns: 1fr auto;
    align-items: end;
    padding: 4.5rem 0 2rem;
  }
  .page-about .about-hero-side {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
    padding-bottom: 0.5rem;
  }
  .page-about .hero-side-num {
    font-family: var(--font-title);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    color: var(--color-pink);
    line-height: 1;
  }
  .page-about .hero-side-label {
    font-family: var(--font-meta);
    font-size: 0.8rem;
    letter-spacing: 0.28em;
    color: rgba(245, 241, 230, 0.55);
  }
  .page-about .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }
  .page-about .service-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  .page-about .compliance-panel {
    padding: 3rem;
  }
}